Updraft cannot be decrypted

Hello, today I tried to restore a backup of my database but it cannot be decrypted, it says that I am using the wrong key, what is definitely not the case.

The password looks like this:

{Pi]9,EJr]\Q@(J_Z:Ah|I*rd5$.6MVZb0ottu3(N;rg+/a5bG|`%<BbJkZ/<~_j

(I slightly changed it for privacy reasons.)

Could it be possible that it is the fault of one or multiple of the letters I used?

I am going to try it with an easier password and report if it works…